mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity
linux-stable/arch/x86/lib
History
Borislav Petkov (AMD) 9a48d60467 x86/retbleed: Fix return thunk alignment 
SYM_FUNC_START_LOCAL_NOALIGN() adds an endbr leading to this layout
(leaving only the last 2 bytes of the address):

  3bff <zen_untrain_ret>:
  3bff:       f3 0f 1e fa             endbr64
  3c03:       f6                      test   $0xcc,%bl

  3c04 <__x86_return_thunk>:
  3c04:       c3                      ret
  3c05:       cc                      int3
  3c06:       0f ae e8                lfence

However, "the RET at __x86_return_thunk must be on a 64 byte boundary,
for alignment within the BTB."

Use SYM_START instead.

Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2023-05-12 17:19:53 -05:00
..
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
Makefile x86: rewrite '__copy_user_nocache' function 2023-04-20 18:53:49 -07:00
atomic64_32.c
…
atomic64_386_32.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
atomic64_cx8_32.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
cache-smp.c smp: Remove smp_call_function() and on_each_cpu() return values 2019-06-23 14:26:26 +02:00
checksum_32.S x86/checksum_32: Remove .fixup usage 2021-12-11 09:09:49 +01:00
clear_page_64.S x86: improve on the non-rep 'clear_user' function 2023-04-18 17:05:28 -07:00
cmdline.c x86/lib: Fix compiler and kernel-doc warnings 2023-01-03 18:46:21 +01:00
cmpxchg8b_emu.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
cmpxchg16b_emu.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
copy_mc.c x86, libnvdimm/test: Remove COPY_MC_TEST 2020-10-26 18:08:35 +01:00
copy_mc_64.S x86/copy_mc_64: Remove .fixup usage 2021-12-11 09:09:46 +01:00
copy_page_64.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
copy_user_64.S x86: rewrite '__copy_user_nocache' function 2023-04-20 18:53:49 -07:00
copy_user_uncached_64.S x86: rewrite '__copy_user_nocache' function 2023-04-20 18:53:49 -07:00
cpu.c x86/lib/cpu: Address missing prototypes warning 2019-08-08 08:25:53 +02:00
csum-copy_64.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
csum-partial_64.c uml/x86: use x86 load_unaligned_zeropad() 2022-01-30 21:26:39 -05:00
csum-wrappers_64.c net: unexport csum_and_copy_{from,to}_user 2022-04-29 14:37:59 -07:00
delay.c x86/delay: Fix the wrong asm constraint in delay_loop() 2022-04-05 21:21:57 +02:00
error-inject.c x86/error_inject: Align function properly 2022-10-17 16:40:59 +02:00
getuser.S x86/mm: Rework address range check in get_user() and put_user() 2023-03-16 13:08:38 -07:00
hweight.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
inat.c x86/insn: Add a __ignore_sync_check__ marker 2021-03-15 11:00:57 +01:00
insn-eval.c x86/insn: Avoid namespace clash by separating instruction decoder MMIO type from MMIO trace type 2023-01-03 18:46:06 +01:00
insn.c x86/insn: Use get_unaligned() instead of memcpy() 2021-10-06 11:56:37 +02:00
iomap_copy_64.S x86/asm: Fix an assembler warning with current binutils 2023-01-03 17:55:11 +01:00
iomem.c x86: kmsan: handle open-coded assembly in lib/iomem.c 2022-10-03 14:03:24 -07:00
kaslr.c x86/kaslr: Fix build warning in KASLR code in boot stub 2022-04-11 09:41:12 +02:00
memcpy_32.c x86/mem: Move memmove to out of line assembler 2022-11-01 15:44:07 -07:00
memcpy_64.S x86: don't use REP_GOOD or ERMS for small memory copies 2023-04-18 17:05:28 -07:00
memmove_32.S x86/mem: Move memmove to out of line assembler 2022-11-01 15:44:07 -07:00
memmove_64.S entry, kasan, x86: Disallow overriding mem*() functions 2023-01-13 11:48:17 +01:00
memset_64.S x86: don't use REP_GOOD or ERMS for small memory clearing 2023-04-18 17:05:28 -07:00
misc.c x86/lib: Include <asm/misc.h> to fix a missing prototypes warning at build time 2023-01-03 11:11:03 +01:00
msr-reg-export.c
…
msr-reg.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
msr-smp.c x86/msr: Fix wr/rdmsr_safe_regs_on_cpu() prototypes 2021-03-22 21:37:03 +01:00
msr.c x86/msr: Make locally used functions static 2021-04-08 11:57:40 +02:00
pc-conf-reg.c x86: Add support for 0x22/0x23 port I/O configuration space 2021-08-10 23:31:43 +02:00
putuser.S x86/mm: Rework address range check in get_user() and put_user() 2023-03-16 13:08:38 -07:00
retpoline.S x86/retbleed: Fix return thunk alignment 2023-05-12 17:19:53 -05:00
string_32.c lib/string: Move helper functions out of string.c 2021-09-25 08:20:49 -07:00
strstr_32.c
…
usercopy.c x86/uaccess: instrument copy_from_user_nmi() 2022-11-08 15:57:24 -08:00
usercopy_32.c x86/usercopy: Remove .fixup usage 2021-12-11 09:09:50 +01:00
usercopy_64.c - Unify duplicated __pa() and __va() definitions 2023-04-28 09:22:30 -07:00
x86-opcode-map.txt x86/opcode: Add the LKGS instruction to x86-opcode-map 2023-01-12 13:06:36 +01:00